📖 Add wifi example (#1817)

examples/cloud-configs/wifi.yaml

@@ -0,0 +1,34 @@
+#cloud-config
+
+hostname: metal-{{ trunc 4 .MachineID }}
+users:
+  - name: kairos
+    # Change to your pass here
+    passwd: kairos
+    ssh_authorized_keys:
+    # Replace with your github user and un-comment the line below:
+    # - github:mudler
+
+stages:
+  initramfs:
+    - path: /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
+      content: |
+        # This file should be generated using wpa_passphrase
+        ctrl_interface=/var/run/wpa_supplicant
+        ctrl_interface_group=admin
+        network={
+                ssid="$SSID_GOES_HERE"
+                psk=$PSK_GOES_HERE
+        }
+      permissions: 0600
+      owner: 0
+      group: 0
+
+  boot:
+    - name: "Enabling wireless"
+      commands:
+        - |
+          systemctl enable wpa_supplicant@wlan0
+          systemctl disable wpa_supplicant
+          systemctl stop wpa_supplicant || :
+          systemctl start wpa_supplicant@wlan0 || :